Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in China
Considerable methane resources exist in abandoned coal mines. However, methane extraction from abandoned mines in China is still in the exploratory stage. This study presents technologies and engineering practices suitable for the extraction of gob methane from abandoned mines using surface vertical...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2018/8043157 |
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| author | Shengyong Hu Ao Zhang Guorui Feng Xiangqian Guo Xuyang Miu Chao Li Dandan Han Jin Wang Lixun Kang |
| author_facet | Shengyong Hu Ao Zhang Guorui Feng Xiangqian Guo Xuyang Miu Chao Li Dandan Han Jin Wang Lixun Kang |
| author_sort | Shengyong Hu |
| collection | DOAJ |
| description | Considerable methane resources exist in abandoned coal mines. However, methane extraction from abandoned mines in China is still in the exploratory stage. This study presents technologies and engineering practices suitable for the extraction of gob methane from abandoned mines using surface vertical wells, including methane drainage systems, well bottom locations, and an intermittent drainage method. Seven surface wells in the Yongan abandoned mine in China were selected for gob methane extraction. Field results showed that the methane volumetric flow rate of a well whose bottom was close to the gob bottom was 2.5 times greater than that of a well with a bottom located in the gob fractured zone. Moreover, intermittent extraction can enable a well to extract methane cyclically at a high volumetric flow rate. A well drilled mistakenly into a coal pillar can be reused through hydraulic fracturing. The overall maximum methane volumetric flow rate, average concentration, and extraction span were 210 m3/h, 83%, and 1100 days, respectively. |
| format | Article |
| id | doaj-art-d8a60a2181054433b1daae24228f5987 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-d8a60a2181054433b1daae24228f59872025-02-03T05:50:27ZengWileyGeofluids1468-81151468-81232018-01-01201810.1155/2018/80431578043157Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in ChinaShengyong Hu0Ao Zhang1Guorui Feng2Xiangqian Guo3Xuyang Miu4Chao Li5Dandan Han6Jin Wang7Lixun Kang8College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaState Key Laboratory of Coal and CBM Co-Mining, Jincheng 048006, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaState Key Laboratory of Coal and CBM Co-Mining, Jincheng 048006, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaConsiderable methane resources exist in abandoned coal mines. However, methane extraction from abandoned mines in China is still in the exploratory stage. This study presents technologies and engineering practices suitable for the extraction of gob methane from abandoned mines using surface vertical wells, including methane drainage systems, well bottom locations, and an intermittent drainage method. Seven surface wells in the Yongan abandoned mine in China were selected for gob methane extraction. Field results showed that the methane volumetric flow rate of a well whose bottom was close to the gob bottom was 2.5 times greater than that of a well with a bottom located in the gob fractured zone. Moreover, intermittent extraction can enable a well to extract methane cyclically at a high volumetric flow rate. A well drilled mistakenly into a coal pillar can be reused through hydraulic fracturing. The overall maximum methane volumetric flow rate, average concentration, and extraction span were 210 m3/h, 83%, and 1100 days, respectively.http://dx.doi.org/10.1155/2018/8043157 |
| spellingShingle | Shengyong Hu Ao Zhang Guorui Feng Xiangqian Guo Xuyang Miu Chao Li Dandan Han Jin Wang Lixun Kang Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in China Geofluids |
| title | Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in China |
| title_full | Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in China |
| title_fullStr | Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in China |
| title_full_unstemmed | Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in China |
| title_short | Methane Extraction from Abandoned Mines by Surface Vertical Wells: A Case Study in China |
| title_sort | methane extraction from abandoned mines by surface vertical wells a case study in china |
| url | http://dx.doi.org/10.1155/2018/8043157 |
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